The turfgrass ecosystem supports a diverse community of nonpest invertebrates that includes which of the following groups?

• A. Nematodes
• B. Arthropods
• C. Annelids
• D. Gastropods

Answer: (B)

Arthropods are the primary nonpest invertebrate group in turfgrass ecosystems. Their exoskeletons and jointed limbs support a huge diversity of life histories that fit well into the turf’s microhabitats, from the soil and thatch to the leaf surface. This broad group includes predators, decomposers, and scavengers that drive important processes: they help control pest insects, recycle organic matter, and contribute to soil structure through their movement and feeding. Because of their sheer diversity and ecological roles, arthropods form the most representative nonpest invertebrate community in turf. Nematodes can include pests, gastropods (snails and slugs) are often pests in moist conditions, and earthworms (annelids) are valuable for soil health but constitute a different invertebrate group, so arthropods best capture the typical nonpest invertebrates found in turf.